Lathe tool-holder.



Patented Nov. 14, I899.

H. J. S. CASSAL.

LATHE TOOL HOLDER.

( Application filed July 14, 1899.)

(No Model.)

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UNrT D STATES PATENT OFFICE.

HANS JOHN STEPHEN CASSAL, oF 'LoNDoN, ENGLAND.

LATHE TOOL-HOLDER.

SPECIFICATION forming part of Letters Patent No. 637,084, dated November14, 1899.

Application filed July 14, 1899. Serial No. 723,860. N mod l-l T0 atwhom, it may concern:

Be it known that I,HANs JOHN STEPHEN OAs- SAL, a subject of the Queen ofGreat Britain and Ireland, residing at 20 St. Georges Square, PrimroseHill, London, England,- have invented new and useful Improvements inLat-he Tool-Holders, (forwhich I have applied for an English patent, No.8,640, bearing date April 25, 1899,) of which the followingisaspecification.

This invention relates to improvements in lathe tool-holders, and hasfor its principal object to enable one holder or body to be used withany number of differently-shaped tools or cutters in such a manner thatoperations at present carried out in the lathes by means of solid forgedtools may be carried out with one solid body or cutter-bar and one of anumber OfSl'IlzLll tools or cutters similarly shaped as to theirbodies,but variously shaped as to the cutting edges, fixed into, buteasily removable from, the said solid body.

It has for an additional object to enable a workman to quickly set anysuch tool or cutter for the time being in the cutter-bar or holder atany desired angle to the work to be operated on without altering theposition of the holder on the slide-rest of the lathe and withoutaltering or in any way interfering with the height of the cutting edgesof the tool.

without altering the position of the main body on the slide-rest ordisturbing such position in any way whatsoever.

I attain these objects in the manner illustrated in the accompanyingdrawings, in which Figure 1 is a longitudinal section of the completeimplement, and Fig. 2 a plan of the holding part only, Fig. 3 being aperspective view of the tool-post hereinafter mentioned and Fig. 4 beinga longitudinal section of a modified portion of the invention.

Similar letters refer to similar parts.

The invention comprises two main portions, a vertically and horizontallyadjustable toolpost and a holder therefor. The holder consists of a bara or equivalent part of convenient shape for fixing in the tool-box ofthe.

slide-restin the usual manner. Integral with or attached to one end ofthe said bar is a block or projection 19, overhanging somewhat the endof a and having a vertical groove 0 in its outer face. The block b isembraced by a sling d, the inner formation of the outer end of which iscurved, as ate, so as to constit ate, with the groove 0, the holef. Therearend of d is thickened and has passed through it a set-screw g, bythe rotation of which a certain amount of lateral movement can be givenby pressure of the point of g on the back of Z), and the hole f therebyincreased or diminished in area.

tinuation of the lower half of the aperture 'nQ Threaded on Z andsituated between the under surface of the head i and the upper surfaceof the head m is a comparatively thick washer 0, having in its lowerface a groove 41 to receive the upper side of the tang of the toolpassed through the aperture n. The upper end of the post Z is prolongedabove the upper end of the bolt h and is screw-threaded and providedwith a nut 19, rotatable by any suitable means, but preferably by apermanently-attached sliding tommy. By slackening the nut 19 the post Zcan be rotated so as to adjust the tool to the required horizontalposition, and by tightening the said nut 19 the tool is retained inposition. To raise or lower the tool, the set-screw g is slackened,which allows the bolt h to be raised or lowered, and when the requiredposition is attained the set-screw g is again tightened up, thuspinching the bolt h between the end of the sling d and the groove 0. Thebolt h is prevented from rotating under the action of the nut k by a pinor feather q, free to run in a groove or feather-way '1' provided in thegroove 0. I sometimes omit the grooved washer 0 and replace it by acomparatively thin and ungrooved washer of ordinary character. It is Thetool-post portion consists of a tubular bolt h, having a head *5 and ascrewa tubular and headed bolt free to move verproposed to have the head2' of softer material than that of the washer o, the upper surface of 0being roughened to increase the grip of the opposing surfaces 70 and 0on one another.

As a modification of the above, the washer may be of truncated-coneshape, as shown at 0, Fig. 3, the under side of the head 2' beingcorrespondingly hollowed out to fit over 0'.

\Vhat I claim as my invention, and desire to secure by Letters Patent,is

1. A vertically and horizontally adjustable lathe tool-holder comprisinga bar to fit into the usual slide-rest box; a block overhanging theouter end of the bar and having a vertical groove at its outer endprovided with a feather Way; a sling surrounding but of greater lengththan the said block; a set-screw passed through the rear end of the saidsling;

tically within the outer end of the said sling; a feather on the saidbolt and entering the said way at the outer end of the said block; a nuton the screw-threaded upper end of the said bolt; a headed post passingaxially through the said bolt; a nut on the upper end of the said post;the post being provided with a transverse tool-hole and a groove in theupper face of its head; a comparatively thick Washer roughened on itsupper face threaded on the post above its head and having a groove topartlyhold the tool in the said tool-hole, the whole substantially asdescribed and shown. 2. A Vertically and horizontally adjustable lathetool-holder comprising a bar to fit into the usual slide-rest box ablock overhanging the outer end of the bar and having a vertical grooveat its outer end provided with a feather Way; a sling surrounding but ofgreater length than the said block; a set-screw passed through the rearend of the said sling;

a tubular and headed bolt free to move vertically within the said outerend of the said sling; a feather on the said bolt and entering the saidway at the outer end of the said block; a nut on the screw-threadedupper end of the said bolt; a headed post passing axially through thesaid bolt; a nut on the upper end of the said post; the post beingprovided with a transverse tool-hole and a groove in the upper face ofits head; a comparatively thin ungrooved washer threaded on the postabove its head, the whole substantially as described.

3. A vertically and horizontally adjustable lathe tool-holder comprisinga bar to fit into the usual slide-rest box a block overhanging the outerend of the bar and having a vertical groove at its outer end providedwith a feather way; a sling surrounding but of greater length thanthesaid block; a set-screw passed through the rear end of the saidsling; a tubular bolt having a head conically hollowed on its under faceand free to move vertically within the outer end of the said sling; afeather entering the way provided at the outer end of the said block; aheaded post passing axially through the said bolt; a nut on the upperend of the said post; the post being provided with a transversetool-hole; a comparatively thick washer having a truncated-cone-shapedupper surface to enter the hollow head of the said bolt, a grooved underface and a roughened upper face, the said washer being threaded on abovethe head of the post, and having a groove to partly hold the tool in thesaid tool-hole, the whole substantially as described and shown.

HANS JOHN STEPHEN CASS'AL. Witnesses:

PETER CHARLES HUGHES, WILLIAM CROSSBY.

